In Part I of The All-in Cost of Building a Custom Home on Your Lot in Indiana (2026 Guide), you learned the costs associated with prepping your land for the construction of a custom home.
Here in Part II, we’re covering what most owners consider the fun part: designing their homes!
Below, you’ll find the answers to common questions regarding engineering fees, material and design choices, and the factors that most influence your price per sq ft. So saddle up. Because if you’re ready to take a deeper dive into the costs associated with building your dream home, this one’s for you.
Are You Building Fully Custom or Using a Pre-Existing Floor Plan?
Choosing between a fully custom home design vs slightly modifying a pre-existing template matters more than you might think.
For starters, pre-existing floor plans have already been designed, are pre-engineered, more accurately priced at the outset of a project, and are often able to support a more streamlined construction process. Because of this “running start,” templated projects are often cheaper and quicker to build—making them a great choice for homeowners who don’t require fully custom solutions.
Fully custom homes, on the other hand, offer the greatest flexibility. A home “built from scratch” can be tailored to your lot, lifestyle, and aesthetic preferences. However, the added flexibility invariably increases the complexity of your design phase, building timeline, and budget.
Therefore, custom build mean:
- Additional architectural and engineering fees
- Longer planning timelines
- More decision-making
- Potential overwhelm with available material options
Despite these challenges, custom homes are a fantastic choice for homeowners desiring a truly unique home. Additionally, fully custom builds make an exciting option for those seeking a creative challenge. And if you don’t mind the decision making and added costs, a custom home may be right for you.
What Are Structural and Architectural Engineering Costs?
To ensure your home is safe and compliant, structural and architectural engineers are hired to go over blueprints and finalize drawings.
These engineers:
- Ensure the structural stability of your home
- Keep your home code-compliant within your state and municipality
- Integrate plumbing, electrical, and HVAC into your floorplan
- Optimize your initial ideas for improved flow and layouts
Generally, structural and architectural engineers charge hourly for their services. In Indiana, these fees range from $100 to $250 per hour. Total fees for a typical residential build fall within $400–$2,000.
What Factors Affect Cost Per Square Foot the Most?
When building a new home, many homeowners want to know the cost per square foot. But as any custom home builder will tell you, pricing isn’t that simple.
What matters far more when determining your home’s final price tag is what’s inside that square footage.
For instance, rooms with plumbing and added electrical hookups (kitchens and bathrooms) can cost $150 to $400 more per square foot than a standard bedroom. Because of this, larger homes—while more expensive overall—actually cost less per square foot than smaller units.
Here are the main drivers affecting cost per square foot:
- Kitchens and Bathrooms: Extensive plumbing and electrical work—plus cabinetry, tile masonry, fixture choices, countertops, and appliance hookups—make kitchens and bathrooms significantly more to build than living areas. Expect to pay $150 to $400 more per square foot in these areas.
- Ceiling Heights & Rooflines: High ceilings and complicated rooflines require more framing, materials, labor, and engineering. Complex designs cost somewhere between 20% and 40% more than simple roof and ceiling designs. What’s more is high ceilings can increase HVAC bills 5% to 25%.
- Finishes & Materials: Material choice is perhaps the largest contributing factor to your overall budget. To make the most of your budget, focus on high-quality materials on your exterior. Solid windows, siding, and roofing all return the highest ROI, prevent needless repairs, and keep bills lower.
- Energy Efficiency: Better insulation, upgraded windows, advanced HVAC systems, and energy-efficient appliances are almost always more expensive upfront. However, the cost per lifetime of ownership is usually lower than lower-end options—something to consider when building a custom home.
How Does Financing Work During Custom Home Construction?
Instead of receiving one lump sum upfront—as you might with a standard mortgage—construction funds are released in smaller amounts with the completion of project milestones (foundation, framing, mechanical systems, drywall, etc.).
Additionally, custom home lenders often require:
- Detailed budgets upfront
- Signed construction contracts for every aspect of your build
- Builder approvals
- Appraisals
- Contingency reserves
As financing a custom home can quickly become complicated, it’s best to work with a builder familiar with the lending process in your area—particularly if they’re able to connect you with a trusted lender they’ve worked with before.
How Can I Control Custom Home Costs?
The best way to prevent your budget from inflating beyond your control is to work with an experienced new home builder in Indiana.
A good builder can help you align design with budget, prioritize the right upgrades and materials, and avoid costly surprises during your build.
If you’re considering building a home in Indiana, reach out to our founder and owner, John Slabach, today. John is an Indiana home builder with 20 years of experience who’s passionate about helping Hoosiers make their dream homes a reality.
He also knows homeowners have lots of questions.
So if you’re starting to think new home construction in Indiana might be a bit more complicated than you thought, you’re right. But with the right builder, you’ll take every step in full confidence that in the end you’ll be loving life in a home you love.
Take the first step toward your dream today by reaching out for an initial consultation and building quote—absolutely free and with zero obligation. John is looking forward to hearing from you and getting the exciting process started of bringing your dream home to life.
So don’t wait. Your dream home is right around the corner.
With over 20 years of experience and 300+ successful projects under our belt, New Horizon Builders has become a trusted builder for new homes of all types and sizes. And as much as our crews believe in quality work and care, what’s even more important to us is building lasting, trusting relationships with homeowners right here in our beloved Hoosier State.
